Basin Elecric 

Attachment A: Capital, O&M Cost for Tail-End SCR 

Scenarlo E Scenarlo F Scenario G Scenarlo H Scenarlo I 

Input Data Low Dust Low Dust Low Dust Low Dust Low Dust 

DeSign Coal lignite Lignite lignite Llcnlte lignite 

Heallnpul MBluihr 5,130 5,130 5,130 5,130 5,130 

NOx Emission IblMMSlu 0.48 0.48 0.48 0.48 0.48 

NOx Removal Efficiency % 90.00 9000 9000 90.00 90.00 

NOx Removed (Calc.) Ibihr 2,216 2,216 2,216 2,216 2,216 

NOx Removed lonstyr 9,334 8,962 8,962 8,962 8,962 

Ammonia Required' (Calc,) Ibihr 873 873 873 873 873 

Ammonia Cost Slion 450 450 450 450 700 

Pressure Drop across caialysl inw.c 400 400 4.00 4,00 4.00 

Pressure Drop jnw.c. 18.0 18.0 18,0 18.0 18.0 

Power Consumpllon kW 6,956 6,956 6,956 6,956 6,956 

Power Cost SIM'M 50()() 5000 50.00 50,00 50.00 

TemperalUre Rise Across Sleam 10 Flue Gas Rehealer F 50 50 50 50 50 

Nalural Gas Requiremenl MBluihr 115 115 11 5 115 115 

(50 F risel (50 F rise) (50 F rise) (50 F rise) (50 F rise) 

Nalural Gas Cost SIMBtu 8.00 8.00 12.00 12,00 1200 

Coal Cost SIMStu 1.00 100 1,00 1.00 1.00 

Catalyst Cost $ 3,960,000 3,960,000 3,960,000 3,960,000 3,960,000 

Total Capital Cost for 5CR S 154000 000 154 000 000 164 000 000 154 000 000 154000 000 

Total Capital Cost for 503 mlliQallon S a a a 5 000 000 6 000 000 

Total Capital Cost S 164 000 000 164000 000 164 000 000 159 000 000 159 000 000 

Annual Capacity Factor % 96.164 923 92.3 923 923 

Outage to replace catal' st weeks 20 40 4.0 4,0 40 

Cost of outage Slweek 3,696,000 3,696000 3,696 000 3,696,()()0 3,696,000 

Catalyst Replacement frequency 12 months 6 months 6 months 6 months Smonths 

Fixed O&M Costs Scenarlo E Scenarlo F Scenario G Scenario H Scenario I 

SCR 

1. Operaling Labor Cost (Slyr) SO SO SO SO SO 

2, Maintenance Materials Cost (Slyr) $462,000 .462,000 S462,000 .477,000 5477,000 

3, Maintenance Labor Cost (Slyr) S308,000 S308,000 S308,000 S318,000 S318,000 

4. Administrative and Support Labor SO SO SO SO SO 

Total (Styr) S770,000 .770,000 $770,000 $795,000 $795,000 

S03 MItigation 

Total (Slyr) SO SO SO S150,000 $150,000 

Total Annual Fixed O&M Cost $770,000 $770,000 $770,000 $945,000 $945,000 

Variable 0l1eratJng Costs 

Scenario E Scenarlo F Scenarlo G Scenarlo H Scenarlo I 

SCR 

1. Ammonia Cost (Styr) Annual 1,655,000 1,589,000 1,589,000 1,589,000 2,471 ,000 

2 Catalyst Cost' (Slyr) Annual 3,960,000 7,920,000 7,920,000 7,920,000 7,920,000 

3, Power Cost, Slyr Annual 2,930,000 2,813,000 2,813,000 2,813,000 2,813,000 

4. Gas Penalty, Slyr Annual 7,750,000 7,441 ,000 11,161 ,000 11 ,161,000 11,161,000 

5. Outage Penalty, Slyr Annual 7,392,000 14,784,000 14,784,000 14,784 ,000 14,784,000 

Total (.Iyr) 23,687,000 34,547,000 38,267,000 38,267,000 39,149,000 

S03 Mitigation 

Total (Slyr) Annual a 0 a 207,000 207,000 

Total Variable O&M Cost Annual 23,687,000 34,647,000 38,267,000 38,474,000 39,356,000 

TOTAL O&M COSTS Annual 24,457,000 35,317,000 39,037,000 39,419,000 40,301,000 

Sargenl & Lundy 
SCR Power Consumption (High/Low Dust) 

High Dust Low Dust 

Gross Power, MW 440 440 

ID fans 

Increase in Fan HP 3,625 8,157 

Increase in Motor kW 2,705 6,085 

Ammonia System Power 

Ammonia Consumption, Iblhr 1091 873 

Power Consumption, kW 109 87 

2 x 20 kW Heaters 2 x 20 kW Heaters 

Dilution Air Blower 

Power Consumption, HP 128.0 102.0 

Power Consumption, kW 95.5 76.1 

Connected Air Blowers, kW 2 x 20 2 x 20 

Dilution Air Heaters 

Power Consumption, kW 387.1 309.7 

Connected Heaters, k W 2 x 75 2 x 75 

Ammonia Pump 

Power Consumption, HP 2.4 1.9 

Power Consumption, kW 1.8 1.4 

Seal Air Fans 

Power Consumption, HP 88 88 

Power Consumption, kW 66 66 

Connected Seal air fan, k W 2 x 125 2 x 125 

Sub-Total Power Consumption, kW 3363 6625 

Electrical and Control Power 

Consumption, kW 168 331 

Total Power Consumption, kW 3531 6956 

% of Gross 0.80 1.58